研究目的
To quantify the emission characteristics of laser-produced plasmas generated using cryogenic Xe targets in the soft x-ray region (1 to 6 nm) and measure the conversion efficiency and emission spot size.
研究成果
The study presents the first quantitative conversion efficiency measurements for Xe in the 1-6 nm range, with CE values up to ～1% at 6 nm and ～0.08% at 1.5 nm. The emission spot size is directly measured at 2 nm, with optimized sizes of ～20 μm. The results suggest that solid xenon targets may provide a feasible alternative to high atomic number metallic droplet systems in the SXR region.
研究不足
The study is limited to single shot operation and does not explore the effects of higher repetition rates or different target materials.
1：Experimental Design and Method Selection:
The study uses a LN2-cooled rotating drum for high repetition rate and Nd:YAG laser systems with varying pulse lengths. High resolution spectra are measured using a grazing incidence spectrometer.
2：Sample Selection and Data Sources:
Cryogenic Xe targets are used, with the thickness of the Xe layer controlled by wipers.
3：List of Experimental Equipment and Materials:
Includes a McPherson 251MX spectrometer, Andor Newton CCD, AXUV100G diode, and various metallic filters.
4：Experimental Procedures and Operational Workflow:
The laser beam is delivered to the target via a 5× expander telescope and a 175 mm lens. Spectra and energy yield are recovered simultaneously.
5：Data Analysis Methods:
The integrated diode signal is combined with the diode spectral response curve to give the total energy emitted for each shot, used to calibrate the filtered spectrum.
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